SMA Negeri 1 Cilegon is an upper secondary school level is located at JL.KH.Tb. Ismail Kavling Blok F Kel.Ciwaduk Kec.Cilegon. To carry out activities registration member libraries, borrowing books, return books, school books are still a record in the ledger and not computerized, so that the member data reports, report borrowing books, return books reports, procurement reports the book is less effective and efficient. The methodology used for the manufacture is prototype system, prototype method is a method which includes the identification of user needs, building prototypes, prototype testing, improvement and development of prototype production version is expected to build up in the system design. For the method of data collection is using observation and interviews. As for the systems approach using a structured approach. The tools used to describe the system model is a data flow diagram (FlowMap) , context diagrams , and Data Flow Diagrams (DFD) and in the design database using data dictionaries , normalization , and Entity Relationship Diagram (ERD) . While supporting software using Netbeans IDE 7.1.2 & MYSQL a as database and programming language is Java. Research by the author to produce a library of information systems in data management of borrowing and returning books to the library staff to optimize performance and enhance library services and report transactions fast, precise and accurate.